Enable the FPS Meter from the Command Menu

Set mousewheel behavior to zoom or scroll with Performance recordings

Open Settings and set the new Flamechart mouse wheel action setting to
change how mousewheels behave on the Performance panel.

For example, when you use a mousewheel on the Main section of a recording,
or when you swipe with two fingers on a trackpad, the default behavior is
to zoom in or out. When you change the setting to Scroll, this gesture now
scrolls up or down.

Figure 6. The Flamechart mouse wheel action setting

Debugging support for ES6 Modules

ES6 Modules are shipping natively in Chrome 61. There's not much going on here
with regards to DevTools, other than that debugging works as you'd expect it
to. Try setting some breakpoints in and stepping through Paul Irish's
ES6-Module-implementation of TodoMVC to see for yourself.